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Reloading both 10MM and 40 S&W

Discussion in '10mm Reloading Forum' started by crankme30, Sep 7, 2010.

  1. crankme30


    Jun 6, 2010
    Hello, I hope I didnt miss this somewhere if it has already been discussed, but I am new to reloading and want to be able to consolidate if possible some of the supplies. I have a Dan Wesson Razorback 1911 in 10MM and a Glock 22 in 40 S&W. I was hoping to find a Powder and Bullet size that I could buy in bulk to fill both calibers..... I was thinking 165 or 180 gr bullets and reading other forums I was thinking about Accurate #7 powder. Any suggestions would be appreciated, and of course I will get manuals for proper powder levels, just looking for any opinions or experience in this area.
    Last edited: Sep 7, 2010
  2. Mike5560


    Mar 6, 2005
    Generally powders that do great for the .40 are too hot for the 10mm, and good for 10 are not hot enough for .40. But AA #7, Blue Dot and Unique all do pretty decent for both. Good middle ground powders, if you will.

  3. crankme30


    Jun 6, 2010
    Thanks, if I using the same powder for both, would the 165 or 180 grain bullets be better?
  4. AZBru88


    May 21, 2010
    I've shot 2 cases of Montana Gold 180 JHP for practice ammo. Just ordered a case of 155 JHP to try because I'm carrying 155's and want to match the load as close as possible. Thats for my 10mm. 180's shoot great. Check out their site. They do carry 165's too!
  5. Mike5560


    Mar 6, 2005
    With the powders I mentioned, 180 grainers are beter for both. You get very little velocity increase by lightening up to 165 with the 10mm....they are decent for .40 in 165, with only about a 100 fps less velocity than the 10mm generally. This is just by looking at the companies loading data. I can't speak for accuracy out of both.
    Also consider ordering from They have plated bullets for cheaper than montana gold. It's known that plated bullets aren't stellar performers in 10mm, but just for practice ammo its hard to beat. Or go lead with an aftermarket barrel.
  6. crankme30


    Jun 6, 2010
    Will the lead bullets cause problems with my factory barrel, why do you recommend an aftermarket barrel.... Would this be the case for both my glock and my Dan Wesson 1911?
  7. Lead is only a problem if it is allowed to accumulate in the barrel. It sticks to and covers the polygonal rifling, raising pressures in the barrel. If you clean after a range session it is not a problem. The real reason to get an aftermarket Glock barrel is the sloppiness in the chamber. An aftermarket barrel has much tighter tolerances and will prevent the brass from getting as "worked", allowing it to last for many more reloadings. It also allows you to run loads at higher pressures without worrying about case ruptures that can occur in a loosely chambered and less supported barrel.
    The Dan Wesson barrel is already nice and tight, so no need for aftermarket there.
  8. PBRLite


    Jan 29, 2009
    Extreme Bullets have always done me right:

    And i think Unique is a good all around powder for both calibers.

    Like others have said, an aftermarket barrel for your Glock will lengthen the life of your brass.
  9. crankme30


    Jun 6, 2010
    Thanks, I checked out Extreme Bullets Website and their prices seem very competitive. Is there a certain Unique Powder you have used? I have not done much research on Unique.
  10. MSgt Dotson

    MSgt Dotson

    Sep 30, 2006
    Unique does work very well for both calibers, it's just not 'popular'.
  11. Mike5560


    Mar 6, 2005
    There aren't different types of Unique. It's only one type of powder and that's what its named. Not only .40 and 10mm, but Ive loaded 1000s of .45 acp...whats good about it is it fills .45 and .40 cases quite a bit, which in case you accidentally double charge you will know it.... of course the downside is more powder equals less total rounds reloaded per pound.
    A lot of people say its a bit dirty of a powder. It is a bit "sooty", but wipes off pretty easily.
  12. texas 48

    texas 48 Gold Member

    May 19, 2007
    San Antonio, TEXAS
    Power Pistol works well in both 10 and .40. It meters well . I use 165 gr bullets in both montana gold for practice and Golden sabers for other purposes. In my G20 I am getting 1280ft/sec with 9.8gr and over 1300 @ max 10.0. Using fired cases I drop down to 8.8 gr and get 1100ft/sec +. Its a mid burning powder and the 165 gr combines good velocity and penitration IMHO but not what I would use for large 4 legged creatures but a good choice for othe threats.
  13. BuffaloBo


    Jun 22, 2004
    I like 180gr for both. Powders that work extremely well for both are Unique, WSF, Power Pistol, Longshot, and for milder loads use 231.
  14. Taterhead

    Taterhead Counting Beans

    Dec 13, 2008
    Boise, Idaho
    A workable combo for both is a 180 gr Berry's FP DS and A7. A7 is REALLY nice to work with, and it is clean burningh. The Berry's bullet is nice too - especially for the price. As others have said, you will not likely get max performance with either cartridge with A7 -certainly not 10mm, but it is no slouch though either.